Smoke-jack



(No Model.)

C. P. HOWARD. SMOKE JACK.

No. 555,542. Patented M55. 12, 1895.

@will Wem UNITED.. STATES PATENT OFFICE.

L CHARLES P. HOWARD, OF HARTFORD, CONNECTICUT.

f SMOKE-JACK.'

SPECIFICATION forming part of Letters Patent No. 535,542, dated March12, 1895.

Application filed December 22, 1893. Serial No, 494,453. (No model.)

.To @ZZ whomz't may concern.-

Be it known that I, CHARLES P. HOWARD, a citizen of the United States,and a resident of Hartford, in the county of Hartford and State ofConnecticut, have invented certain new and useful Improvements inSmoke-Jacks, of which the following is a full, clear, and exactdescription', whereby any one skilled in the art can make and use thesame.

The object of my invention is to provide a device or apparatus which isadapted to utilize the force of a moving current of air across the axisof the body part of the device to induce a current through the body,such induced draft being utilized in removing smoke, gas or foul airfrom a closed room or chamber. Such a device is more particularlyadapted for use on a railroad car and my improvement is herein describedand illustrated in connection with an apparatus specially fitted for thepurpose of removing heat and smoke of a Vlamp from the interior of arailroad car within which the lamp is carried.

My invention consists more particularly in the special construction ofthe device by which an outiiowing current through the body part of thedevice is induced, while the draft openings are so located as to preventthe infiow of cinders or other objectionable matter; and it furtherconsists in the details of the several parts making up the apparatus asa whole and in the combination of such parts as more particularlyhereinafter described and pointed out in the claims.

Referring to the drawings: Figure 1 is a View in side elevation of alamp on a plane lengthwise of the center of a car-,to the roof of whichmy improved apparatus is fixed, showing the smoke-jack in centralsection. Fig. 2 is a detail .View in section through the smoke-jack on aplane at right angles to the plane of view of Fig. l. Fig. 3 is a detailtop View of the top plate of the jack. Fig. 4 is a detail bottom view ofthe same.

In the accompanying drawings the letter a. denotes the chimney of arailway car lamp which may be fitted with a form of burner giving alarge amount of light and therefore consuming a comparatively largequantity of oil, the smoke, gas, and heat from which it is necessary toremove from the car for the com` fort of the passengers and also toprevent injury to the interior of the car. These products of combustionare more conveniently carried through the roof, but a fault in priordevices for this purpose has been that while allowing the outiiow Itheyhave not been so arranged as to prevent the iniiow of currents of air,of gas, smoke, and of cinders.

In carrying out my improvement an opening is formed through the roof bof a railway car and the smoke-jack c secured therein. This overlies atubular body d secured to the roof of the car and separated therefrom bya metallic lining e, the body being preferably secured to the roof ofthe car from within by means of fastening devices, asy screws passingthrough the outturned iiange d. Pendentfrom the body part is the usualform of bell or collector f into which the products of combustion fromthe lamp are directly discharged from below, the collector having' aflaring mouth as shown.

A series of openings for the passage of air through the interior of thecollector and also between it and the tubular body ol is provided, thewhole device serving to form a direct outlet for the products ofcombustion delivered from the lamp chimney and also for heated and foulair which may flow more or less indirectly from other parts of the car.All these, however, pass out through a discharge outlet g.

The smoke-jack c is formed preferably of metal cast to shape with aiiange c which rests upon the roof of the car and by means of which thesmoke-jack is secured in place. The smoke-jack comprises a centralchamber h and lateral chambers t', t', the latter having lengthwiseopenings at the bottom arranged substantially parallel to the directionof movement of the car, the body part of the smokejack being secured onthe roof in such position that the openings to these lateral chambersc', t', shall extend in the direction of movement of the car, the arrowin Figs. l and 3 indicating the position of the smokejack with referenceto the car body, and also the direction of movement of the car, thepoint of the arrow looking toward the front end of the latter.

The top of the smoke-jack immediately overlying the lateral chambers isinclined upward and outward, this portion iof the up IOO per wall orroof being thus set at an angle which would tend to deflect outward anyspark or cinder which from any cause might be driven into the open mouthof the chamber. Within the body of the smoke-jack there is preferablyarranged a smoke bell or disk la pendent from the center of the roof ofthe smoke-jack, its function being to interpose an additional barrier tothe ingress of sparks and cinders and also to deflect currents of airand prevent any sudden inward draft which would affect the flame of thelamp and cause it to iiicker if unobstructed. An important feature ofthe improvement resides in the closing of the smoke-jack on the frontand rear surfaces and thus preventing the ingress of rain, snow, or ofcinders, or sparks, while 'permitting the egress of air through thedischarge openingg through the mouths of the lateral chambers fi, andil. It has been determined by extended experiment that by fitting acarwith my improved smokejack, .constructed as within described, allsmoke and other products of combustion are drawn out from the ear, andthat no cinders or sparks or indrafts of air that affect the burning ofthe lamp can flow in a return direction through the apparatus and intothe car. Experiment has proved it to be an effective preventive ofsmoking and guard against the objectionable features incident to priordevices of this class. The rapid flow of currents of air past the mouthsof the lateral openings causes induced outward flowing currents ofsufficient velocity to thoroughly remove the smoke, heat, and foul airwhich are incident to the use of a lamp within the car, when such lampis arranged in proper position to discharge its products of combustioninto and through the apparatus of which the smoke-jack forms a part.

I claim as my invention- 1. In combination with the roof of a railwaycar having an opening therethrough, a smoke jack secured to the roof andhaving lateral extensions, a central chamber located in the jack,chambers located in the lateral extensions and opening from the centralchamber, and with their roofs extending upward and outward forming adeflector, a disk suspended within the body part of the jack and servingas an additional deflector, and narrow openings from the under side ofthe lateral extensions and out of the chambers therein, allsubstantially asdescribed.

2. In combination with a railway car, a kdischarge opening through theroof thereof, a laLnp secured below the opening, the collector arrangedabove the lamp with a discharge outlet arranged centrally of asmoke-jack, and a smoke jack secured to the upper surface of the roofand having overhanging side portions with outlet through the jack formedby narrow openings arranged lengthwise of the car body and only in theunder wall of the lateral chain-bers, all substantially as described.

CHARLES P. HOWARD.

Witnesses:

CHAs. L. BURDETT, ARTHUR B. JENKINS.

